I have only kept one planted tank a few years back, I didnt have much luck with it. Now I have a 30 gal coldwater tank and a 10 gal tropical community tank. Both have only fake plants. I really want to try planted again. I am getting a 15 gal free from a friend. Any advice, comments, or recomendations would be great. Anything from filter, CO2, plant types, fish, gravel/sand, or nuitrients, I just dont know much in the way of living plants. Thanks in advance.